The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer.
The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer. (A) as little risk as one in a million chances to cause (B) as little risk as one chance in a million of causing (C) as little risk as one chance in a million that it will cause (D) a risk as little as one chance in a million for causing (E) a risk as little as one chance in a million for it to cause
选B。as + adj. + noun. + as这里面的noun本来就是可以放在里面或者外面的。D里面risk of occuring sth.应该用of,而不是for。如果D改为present a risk as little as one chance in a million of causing cancer意思上并没有什么区别,只是B的表达更加简洁。